Frequencies for first 10,000 rows of birday variable in natl1987 dataset :

 Birth Date |
      - Day |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |        334        3.34        3.34
          2 |        374        3.74        7.08
          3 |        383        3.83       10.91
          4 |        370        3.70       14.61
          5 |        402        4.02       18.63
          6 |        383        3.83       22.46
          7 |        347        3.47       25.93
          8 |        349        3.49       29.42
          9 |        414        4.14       33.56
         10 |        354        3.54       37.10
         11 |        373        3.73       40.83
         12 |        380        3.80       44.63
         13 |        350        3.50       48.13
         14 |        329        3.29       51.42
         15 |        298        2.98       54.40
         16 |        368        3.68       58.08
         17 |        330        3.30       61.38
         18 |        314        3.14       64.52
         19 |        373        3.73       68.25
         20 |        358        3.58       71.83
         21 |        316        3.16       74.99
         22 |        300        3.00       77.99
         23 |        338        3.38       81.37
         24 |        269        2.69       84.06
         25 |        264        2.64       86.70
         26 |        272        2.72       89.42
         27 |        317        3.17       92.59
         28 |        262        2.62       95.21
         29 |        163        1.63       96.84
         30 |        176        1.76       98.60
         31 |        140        1.40      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 3 Jan 2016